<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>登录页面</h1>
  <input type="text" v-model="user.username" placeholder="用户名">
  <input type="password" v-model="user.password" placeholder="密码">
  <input type="button" value="登录" @click="login()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            user:{
              username:"",
              password:""
            }
        }, methods: {
            login(){
              axios.post("/login",v-user).then(function (response) {
                if (response.data == 1){
                  alert("登录成功!")
                  location.href = "/";
                }else if (response.data == 2){
                  alert("用户名不存在!")
                }else {
                  alert("密码错误!")
                }
              })
            }
        }
    })
</script>
</body>
</html>